Air-pump



AIR PUMP.

APPLICATION FILED DEC. I8. 19H.

afrol ne I4 connaiI Norme, or: HAsrINes, NEBRASKA.

Arnfrunr.

To all whom #may concern:

- Y -Be it` known. thatV L ,CoNRA-n NOLDA, a

citizen vof the United lStates', residing iat Hastings, in the county.of Adams and State of Nebraska, `have invented `certain new and usefulImprovements in Air- Pumps, of which the following is a specification.My invention relates to improvements in air pumps ofthe reciprocatorytype.

An important object of the invention 1s to provide apparatus ofthe abovementioned character, which is simple in construction,

inexpensive'to manufacture, highly convenlent lnduse, and wlll supply aneven and continuous volume of compressed air, upon be# of illustrationis shown a preferred embodi' ment of my invention, the numeral 1designates a lbase` receiving "thereon La verticalpump barrel orcylinder 2, having its lower end held within an annular flangeV 3 of anattaching kplate* 4. This attachingplate is securedto the base 1, by`screws 5 or the like.`

Arranged to reciprocate within the barrel l or cylinder 2 is a piston 6of anyv well known or preferred construction, having connec tion with Vapiston rod 7, extending through an'opening 8 in a cap 9, suitablysecuredV to the top of the barrel 2, as shown.

.This cap 9 has an opening or .port 1() formed` thereimasshown. Thepiston rod 7 extends `12 is closedby upwardly beyond the cap 9 and isrigidly connected with a transverse handle 11.

Disposed upon the base 1, upon one side of the barrel 2 is an airholding tube or cylinder 12, the lower end of which is held within anannular flange 13 of an attaching plate 111, secured to the base 1 byscrews 15 or the like. The upper end of the tube a cap '16 having an airtight connectiontherewith.` t

Surrounding the barrel or cylinder 2 are rings 17, preferably clampedtheretoby any suitable means, and these rings have connection with arms18, securedV to rings 19,

Specicationoflietters Patent. v

` .npbiicaiion inea December 1s, 1917; serial No. m1757271l clamped:theretoby any suitable. means. l

. Arranged within the lower end, orv bottom ofthe `barrel 2i's a plug20, preferably hav"- ing an vair tight 4fit therein. This plug isprovided witha-central opening or port 21, the upper end of which istapered to form a valve -seat 22,V for an upwardly opening check valve23. The central port 21 leads into a horizontal port 24;, havingcommunication with the atmosphere, asshown. AThe plug 20 is furtherprovided with a port 25, passing through the top thereof upon one sideof the port 21. The lower end of the port 25 is enlarged and also passesthrough the barrel 2 to receive one end ofa ppe26, i

as shown.

Arranged within the lower end or bottoni of the tube 12 is a plug-27,preferably having an air tight fit therein. This-plug'is provided` witha central port 28, the upper end of whichV is taperedfto provide a valveseat 29, such 4port passing through the top of the plug. The valve seat29 is adapted '80 r'forfthe reception thereon -of an upwardly ikopening-,valve 30, or check valve. The opposite end of the port 28leads into a horizontal port 31, receiving the opposite end of the pipe26. vThe numeral .32 designates a port formed in the plug .27, andpassing through the top thereof. This port has its oppositeend `passing'through the tube 12,k Vand recelves therein a tubular coupling 33,

having a flexible' hose 311v secured thereto.

The operation of the pump is as follows: Upon the upstroke of the piston6, the

valve 30 remains seated while the valve. 23

opens, whereby air .passes into'the lower end of the barrel 2 throughthe-port 21. Upon the fdown stroke of the piston 6, valve 23 closes,while valve 3() opens, thereby supxplyingl the compressed air into theholding` tube '12. The compressed air is withdrawn from the tube 12,through the hose 34C.v

barrels or cylinders, whereby access may be readily had to the valves,by taking outv the plugs, .which are of course removable.

It is to be understood that the form of my invention herewith shown anddescribed is to be taken as a preferred' example of the same, and thatvarious changes in the shape, size, and arrangement of parts may be re-A of the invention or the scope of the subsorted to Without departingfrom the spirit joined claim. i f A- Y Y Having thus described myinvention, 1 claim: f

A pump of the character described, com-1 prising a substantiallyvertical lbarrel, a l

. plug arranged in the lower end of the barrel arranged Within'the lowerportion of the barrel and disposed on said Valve seat, said 15 .plugbeing provided With a vertical outlet opening and a transverse outletconduit communicating With the outlet opening, and a piston mounted toreciprocate Within the barrel above the single valve.

In testimony whereof I aiix my signature 20 in" presence ofitWoWitnesses. f

y Y p Y CONRAD NOLDA.V Y Witnesses: f, f f s! ff f f Crus. BRCKMN,

Y GRACE ITIELDENBRAND.

